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city, all you got to do is take a helicopter, just go up and wait three hours and come back down again, okay? what's wrong with that? that helicopter doesn't go up and just stay there. that helicopter is moving just as fast as the earth, and so it just keeps moving around like that, you see? so you're riding an airplane. you've been in an airplane? you flip a coin. when you flip a coin, do you have to adjust for the motion of the plane? let's suppose you're going this way 600 miles an hour. i'm like, "man, if i flip that coin, boom, "that coin gonna go bam, 600 miles an hour against the passenger in the back seat." - that happen? - no. why doesn't it happen? what if you were on a plane and someone says, "hey, how come, man? i flipped a coin, flipped it, come right back down." it's not that--i know i'm going 600 miles an hour. when i flipped it--in fact, you ever be in an airplane, you see a fly come by? man, that fly going 600 miles an hour... [laughter] ...with respect to the ground down below, isn't that true? but how about the coin flip? how come when you flip the coin it doesn't go
student at city college in san francisco in 1980. got into conceptual physics, it spurred her on. today, she is a design engineer at jet propulsion labs in california at pasadena, and she is working on these fly-by missions and all that stuff and right now she is doing what, you are making a pod to fly in the next space shuttle, and that's what she is doing, okay? tinnie, hold these up and then tell me which of those two has the most mass? they feel the same to me. these are the same weight gang, okay? but i want you to do something else tinnie. i want you to hold it at the midpoint, and then rotate it like this. and now try this one. any difference? this is hard to rotate. very much hard. take them both and do it. like something up here? yeah, you can really feel the difference. let's try this. put this in your hand, flip that like this, you do like this, flip it. okay, now change gang, now change. oh-oh-oh-oh huh? guess how the lead is distributed inside here, thanks very much, tinnie. guess how the lead is distributed, gang. guess where it's closer to the center. take a guess. they'r
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